TWI791968B - Method for uniformly dyeing fabric - Google Patents

Abstract

A method for uniformly dyeing fabric including following steps is provided. An ink-jet printing process is performed on a fabric, such that a dye is disposed on a surface of the fabric in a dot arrangement. A mist spraying process is performed on the fabric, such that the fabric receives droplets. A steam fixing process is performed on the fabric, such that the dye is diffused on the surface of the fabric and is fixed on the surface of the fabric.

Description

How to dye fabric evenly

The present disclosure relates to a method for uniformly dyeing a fabric, and more particularly to a method for uniformly dyeing a fabric treated by an inkjet printing process.

Under the trend of globalization, the textile industry is facing strong competitive pressure. The textile industry must constantly develop new technologies and diversified products in order to face global competition. In the fabric manufacturing process, it is often necessary to dye the fabric, and the existing dyeing method is usually to place the cloth in a dyeing machine and soak it in a dye solution, so that the cloth can be dyed in the dyeing machine. However, this dyeing method is likely to cause waste of dye solution and excessive consumption of energy. However, if the inkjet method is used to dye the cloth, it is easy to cause uneven dyeing of the cloth. Therefore, how to reduce the waste of dye solution in the dyeing process and improve the uniformity of dyeing of fabrics has become the focus of attention in related fields.

According to an embodiment of the present disclosure, a method for uniformly dyeing a fabric includes the following steps. The inkjet printing process is performed on the fabric, so that the dye is arranged on the surface of the fabric in the form of grid dots. A spray wetting process is performed on the fabric so that the fabric catches the droplets. The fabric is steamed and fixed, so that the dye is diffused on the surface of the fabric and fixed on the surface of the fabric.

In some embodiments of the present disclosure, the relative humidity of the steam-fixing process is between 15% and 100%.

In some embodiments of the present disclosure, the dye is a sublimation disperse dye, and the relative humidity of the steam-fixing process is between 15% and 30%.

In some embodiments of the present disclosure, the dye is a high-fast disperse dye, and the relative humidity of the steam-fixing process is between 80% and 100%.

In some embodiments of the present disclosure, the temperature of the steaming and fixing process is between 170° C. and 190° C.

In some embodiments of the present disclosure, the total time of the wet spraying process and the steaming color fixing process is between 10 minutes and 20 minutes.

In some embodiments of the present disclosure, the diameter of the droplets is between 5 microns and 200 microns.

In some embodiments of the present disclosure, the method for uniformly dyeing the fabric further includes: analyzing the color strength value (K/S) and the color difference value (CMCΔE) of the fabric.

In some embodiments of the present disclosure, analyzing the color strength value and the color difference value analysis of the fabric includes: using a spectrophotometer (Datacolor) to analyze the Lab value of the fabric, wherein the Lab value analysis is carried out at 4 sampling points of the fabric The Lab value is measured and the average value is calculated, and the circumference diameter of each sampling point is between 9mm and 30mm.

In some embodiments of the present disclosure, when the color strength value of the fabric is less than 20, the color difference value is less than or equal to 0.84.

According to the above-mentioned embodiments of the present disclosure, the method for uniformly dyeing the fabric is to dye the fabric through the inkjet printing process, the spray wet process and the steam fixation process. Through the inkjet printing process on the fabric, the dye can be precisely sprayed on the surface of the fabric, thereby reducing the waste of dye. In addition, through the process of spraying and wetting the fabric, it can promote the diffusion of dyes on the surface of the fabric during the steaming and fixing process, thereby improving the dyeing uniformity of the fabric.

The following will disclose multiple implementations of the present disclosure with diagrams, and for the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present disclosure. That is to say, in some embodiments of the present disclosure, these practical details are unnecessary, and thus should not be used to limit the present disclosure. In addition, for the sake of simplifying the drawings, some well-known structures and components will be shown in a simple and schematic manner in the drawings. In addition, for the convenience of readers, the size of each element in the drawings is not drawn according to actual scale.

The disclosure provides a method for uniform dyeing of fabrics, which is to dye the fabrics through inkjet printing process, spray wet process and steam fixation process. Through the inkjet printing process on the fabric, the dye can be precisely sprayed on the surface of the fabric, thereby reducing the waste of dye. The dyeing uniformity of the fabric can be improved by spraying the fabric to the wet process and steaming the color fixing process.

FIG. 1 is a schematic configuration diagram of a dyeing device 100 according to an embodiment of the present disclosure. The dyeing equipment 100 includes an inkjet printing device (not shown) and a wet steaming device 110 . In some embodiments, the fabric 50 is sequentially passed through the inkjet printing device and sent to the wet steaming device 110 for dyeing. In some embodiments, the fabric 50 is conveyed by conveying elements 120, such as rollers. The inkjet printing device is configured to perform an inkjet printing process on the fabric 50 so as to configure the dye on the surface of the fabric 50 . The wet steaming device 110 is configured to perform a spray wet process and a steam fixation process on the fabric 50, so that the liquid droplets are sprayed onto the surface of the fabric 50, and the dye is diffused and fixed.

FIG. 2 shows a flow chart of a method for uniformly dyeing fabrics using the dyeing apparatus 100 of FIG. 1 . The method for uniformly dyeing a fabric includes steps S10, S20 and S30. In step S10, an inkjet printing process is performed on the fabric. In step S20, the fabric is sprayed and wetted. In step S30, the fabric is subjected to a steaming and color-fixing process. In the following description, the above-mentioned steps will be further described.

Please refer to FIG. 1 and FIG. 2 at the same time. In step S10 , the dyeing equipment 100 performs an inkjet printing process on the fabric 50 through an inkjet printing device, so as to arrange dyes on the surface of the fabric 50 . In detail, since the inkjet printing process can accurately spray the dye on the surface of the fabric 50 in the form of fine droplets, the configuration of the dye on the surface of the fabric 50 will not overlap, so that the dye can be configured in the form of dots. on the surface of the fabric 50, so as to avoid the phenomenon of uneven dye spraying and reduce the waste of dye. In some embodiments, the volume of each drop of dye is between 3 picoliters and 48 picoliters.

In some embodiments, the surface of the fabric 50 can be sprayed with dyes of multiple colors, and one color of dye can form a dot on the surface of the fabric 50 . In this way, dyes of different colors can be mixed into desired colors after being diffused in the subsequent steaming and fixing process. Since the method for uniform dyeing of fabrics in the present disclosure is to produce desired colors through the diffusion and mixing of dyes, the pipelines corresponding to each nozzle in the inkjet printing device can be fixedly filled with dyes of the same color, thereby reducing the dye density. Waste and water consumed for cleaning pipelines.

In some embodiments, the color of the dye includes cyan (cyan), magenta (magenta), yellow (yellow), black (black), light cyan (light cyan), light magenta (light magenta), and light black (light black), but not limited to this. In some embodiments, dyes of different colors can be sprayed on the surface of the fabric 50 at a fixed concentration, and the concentration of the light dye is, for example, one fourth of that of the dark dye. In some embodiments, the type of dye can be, for example, disperse dyes (such as sublimation type disperse dyes and high fastness type disperse dyes), reactive dyes or acid dyes. Different types of dyes are suitable for spraying on fabrics 50 of different substrate materials. For example, disperse dyes are suitable for spraying on the fabric 50 whose base material is polyester, and acid dyes are suitable for spraying on the fabric 50 whose base material is nylon.

In step S20, the dyeing equipment 100 performs a spraying process on the fabric 50 through the steaming device 110, so that the fabric 50 can receive the droplets sprayed by the steaming device 110, so as to facilitate the dyes to be fixed in the steaming place Diffusion is carried out during the process. At the same time, in step S30 , the dyeing equipment 100 performs a steaming and fixing process on the fabric 50 through the wet steaming device 110 , so that the dyes arranged on the fabric 50 can be diffused and fixed on the surface of the fabric 50 . In other words, the wet-steaming device 110 can simultaneously perform a spraying-wetting process and a steaming-fixing process on the fabric 50 .

In some embodiments, when the fabric 50 enters the wet steaming device 110 and accepts the liquid droplets, the dyes configured on the fabric 50 can be dissolved in the liquid droplets, so that the dyes can be simultaneously liquid in the steaming and fixing process. The form and the form of the gas are diffused, thereby improving the dyeing uniformity of the fabric 50 . In detail, the dyes on the fabrics that have not been sprayed to the wet process can only diffuse in the form of gas during the steaming and fixing process, while the dyes that are sprayed to the fabric 50 of the wet process can be diffused in the steaming and fixing process. Diffusion can be carried out in the form of liquid and gas at the same time. In some embodiments, the diameter of the droplets is between 5 microns and 200 microns. In other words, the liquid droplets are sprayed on the surface of the fabric 50 in the form of mist, so as to prevent the dyes arranged on the surface of the fabric 50 from being poorly diffused due to instantaneously receiving too large droplets, thereby affecting the dyeing of the fabric 50 Uniformity.

In some embodiments, the relative humidity of the spray humidification process is between 15% and 100%. Since the wet spraying process and the color fixing process in the steaming area are carried out in the wet steaming device 110 at the same time, the relative humidity of the color fixing process in the steaming area is also between 15% and 100%. By adjusting the relative humidity in an appropriate range, the dyes disposed on the surface of the fabric 50 can achieve a better diffusion effect, thereby improving the dyeing uniformity of the fabric 50 . Specifically, if the relative humidity is too low, the dye disposed on the surface of the fabric 50 will not easily diffuse in a liquid form.

In some embodiments, the total time of the spraying wetting process and the steaming color fixing process is between 10 minutes and 20 minutes. For example, the wet spraying process and the steaming color fixing process are simultaneously performed in the wet steaming device 110 , and the respective times of the spraying wetting process and the steaming color fixing process are the same and equal to the above-mentioned total time. By adjusting the total time of the spray-to-wet process and the steam-fixing process in an appropriate range, a more suitable relative humidity can be provided in the spray-to-wet process, and better fixing can be achieved in the steam-fixing process effect and reduce energy waste. In detail, if the above total time is too short, the dye will not have enough time to diffuse; on the contrary, if the above total time is too long, it may cause the dye to diffuse excessively and cause color shift, and it will also reduce the production capacity. .

In some embodiments, different types of dyes have different types of diffusion capabilities. Specifically, when using high-fastness disperse dyes, since the high-fastness disperse dyes are not easy to sublimate from a solid state to a gaseous state at a temperature of 150°C to 210°C, it is not easy to sublimate from a solid state to a gaseous state at a temperature of 150°C to 210°C. It has better liquid diffusion ability at high temperature; when sublimation disperse dyes are used, since sublimation disperse dyes can be sublimated from solid state to gas state at a temperature of 150°C to 210°C, it is suitable for steam-fixing process It has better gas diffusion ability at low temperature. Therefore, different types of dyes can achieve better diffusion effects by adjusting the relative humidity of the spray wet process and the steam fixation process, as well as the total time of the spray wet process and the steam fixation process.

In detail, when the dyes used are high-fast disperse dyes, the relative humidity of the spray wet process and steam fixation process is between 80% and 100%, and the spray wet process and steam fixation The total time of the process is between 10 minutes and 20 minutes. By setting the relative humidity and the total time of the spray-wetting process and the steam-fixing process in a relatively high range, the high-fastness disperse dye can be mainly diffused in the form of liquid, so that the fabric 50 has a relatively high Excellent dye uniformity. On the other hand, when the dyes used are sublimation disperse dyes, the relative humidity of the spray wet process and the steam fixation process is between 15% and 30%, and the relative humidity of the spray wet process and the steam fixation process The total time is between 10 minutes and 15 minutes. By setting the relative humidity and the total time of the spraying wet process and the steam fixation process in a lower range, the sublimation disperse dye can be mainly diffused in the form of gas, so that the fabric 50 can have better Dye uniformity. In addition, for sublimation disperse dyes, if the relative humidity of the spraying wet process and the steam fixation process is too high, the dyes arranged on the surface of the fabric 50 are likely to diffuse excessively due to the high humidity, resulting in color loss. offset.

In some embodiments, the temperature of the steaming and fixing process is between 170°C and 190°C. In a preferred embodiment, the temperature of the steaming and fixing process is between 175°C and 180°C. By adjusting the temperature of the steaming and fixing process in an appropriate range, the dye can achieve better diffusion and fixation effects. In detail, if the temperature of the steaming fixation process is too low, the dye will not be able to effectively diffuse due to insufficient energy, and will make it difficult for the dye to fix on the surface of the fabric 50; If it is too high, the dye is likely to be fixed on the surface of the fabric 50 before spreading, thereby affecting the dyeing uniformity of the fabric 50.

In the following description, the fabrics of Embodiment 1 to Embodiment 12 of the present disclosure will be further described. The fabrics of each example are prepared by performing the dyeing process in steps S10 to S30. In addition, the fabric of each example is a mesh knitted fabric, and the dye used in each example is a sublimation type disperse dye. In addition, the relative humidity of the spraying wetting process and the steaming fixation process of the fabrics of each embodiment is 15%, the temperature is 180° C., and the time is 11 minutes. The colors presented by each embodiment are shown in Table 1.

Table I fabric color Example 1 light blue Example 2 light red Example 3 light yellow Example 4 light green Example 5 Light purple Example 6 blue Example 7 red Example 8 yellow Example 9 green Example 10 Purple Example 11 yellow-green Example 12 Grass green

Various tests and evaluations will be carried out on the fabrics of the various embodiments below. Experimental Example 1: Evaluation of fabric color strength (K/S) and color difference (CMCΔE)

In this experimental example, a spectrophotometer (Datacolor) is used to measure the color strength value related to the color depth of the fabric and the color difference value related to the color difference of the fabric on the fabrics of Examples 1 to 10, wherein The color strength value of the fabric is obtained by measuring the absorbance of the fabric under the irradiation of visible light with a wavelength of 400nm to 700nm, and the color difference value of the fabric is obtained by collecting 4 sampling points on the surface of the fabric to measure the Lab value and take the average value Calculated, and the circumference diameter of each sampling point is between 9mm and 30mm. The measurement results of the fabrics of each embodiment are shown in Table 2.

Table II Color strength value (K/S) Color difference value (CMCΔE) Example 1 16.5 0.24 Example 2 11.6 0.84 Example 3 7.2 0.34 Example 4 35.0 0.30 Example 5 23.1 0.13 Example 6 112.0 0.65 Example 7 110.5 0.25 Example 8 71.4 0.25 Example 9 120.8 0.35 Example 10 74.4 0.31

As shown in Table 2, whether it is a dark-colored or light-colored fabric, the color difference value is less than or equal to 0.84, which meets the standard of the industry. It should be understood that, compared with dark-colored fabrics, light-colored fabrics have fewer color points per unit area, so it is difficult to achieve good dyeing uniformity. However, by adopting the disclosed method for uniformly dyeing fabrics, light-colored fabrics with shade strength values less than 20 can have a color difference value of less than or equal to 0.84, which means that light-colored fabrics can achieve good dyeing uniformity. Experimental example 2: Evaluation of the reproducibility of the color difference value (CMCΔE) of the fabric

In this experimental example, a spectrophotometer (Datacolor) was used to measure the color difference values of the fabrics of Examples 1 to 10 twice to evaluate the reproducibility of the color difference values of the fabrics, wherein the color difference of the fabrics The method for measuring the color difference value is the same as the method for measuring the color difference value used in Experimental Example 1, and will not be repeated here. The measurement results of the fabrics of each embodiment are shown in Table 3.

Table three Color difference value measured for the first time (CMCΔE #1) The color difference value of the second measurement (CMCΔE #2) Example 1 0.24 0.49 Example 2 0.84 0.58 Example 3 0.34 0.49 Example 4 0.30 0.40 Example 5 0.13 0.39 Example 6 0.65 0.50 Example 7 0.25 0.17 Example 8 0.25 0.22 Example 9 0.35 0.17 Example 10 0.31 0.14

As shown in Table 3, regardless of whether it is dark-colored or light-colored fabrics, the difference in color difference between the two measurements is less than 0.26, which has good reproducibility. In addition, the color difference values of the fabrics in each embodiment are all less than or equal to 0.60 in the second measurement, which meets the standard in the industry. Experimental example 3: Evaluation of color difference value (CMCΔE) of large-scale fabrics

In this experimental example, a spectrophotometer (Datacolor) is used to measure the color difference values of the fabrics of Example 5, Examples 7 to 9 and Examples 11 to 12, wherein Example 5, Example 7 to 9 and the fabric size of embodiment 11 are 10 yards, and the fabric size of embodiment 12 is 20 yards, wherein the measurement method of the color difference value of fabric is the same as the measurement method of the color difference value used in Experimental Example 1, here I won't go into details. The measurement results of the fabrics of each embodiment are shown in Table 4.

Table four Color difference value measured for the first time (CMCΔE #1) The color difference value of the second measurement (CMCΔE #2) The color difference value of the third measurement (CMCΔE #3) Example 5 0.26 0.27 0.50 Example 7 0.28 0.31 0.37 Example 8 0.38 0.39 0.54 Example 9 0.31 0.41 0.58 Example 11 0.18 0.27 0.42 Example 12 0.20 0.55 0.70

As shown in Table 4, the color difference values of the fabrics of Example 5, Examples 7 to 9, and Examples 11 to 12 are all less than or equal to 0.70, which meets the standard in the industry. It can be seen that the method for uniformly dyeing fabrics disclosed in the present disclosure can be applied to large-sized fabrics, which is beneficial to the mass production of fabrics. Experimental Example 4: Evaluation of Fabric Fastness to Washing, Dry Rubbing, Wet Rubbing and Light Fastness

In this experimental example, the fabrics of Example 4, Example 9 and Example 10 were measured for washing fastness, dry rubbing fastness, wet rubbing fastness and sunlight fastness, wherein the measurement of washing fastness The AATCC 61-2013-1A test method is used, the rubbing fastness and wet rubbing fastness are measured using the AATCC 8-2016 test method, and the light fastness is measured using the CNS3845 L3074-1988 test method. The measurement results of the fabrics of each embodiment are shown in Table 5.

Table five Test items Test Results Example 4 Example 9 Example 10 Washing fastness black fade 4.5 4.5 4.5 pollute wool 4.5 4.5 4.5 acrylic 4.5 4.5 4.5 Tetoron 4.5 4.5 4.5 nylon 4.5 4.5 4.5 cotton 4.5 4.5 4.5 acetic acid 4.5 4.5 4.5 Dry rubbing fastness 4.5 4.5 4.5 Wet rubbing fastness 4.5 4.5 4.5 Light fastness 4 or more 4 or more 4 or more

As shown in Table 5, the fabrics of Example 4, Example 9 and Example 10 almost do not have color transfer to wool, acrylic, Tetoron, nylon, cotton and acetic acid, and it is in dry rubbing fastness, It can almost maintain its original color after the wet rubbing fastness and light fastness tests. It can be seen that the fabrics of Example 4, Example 9 and Example 10 can have a considerable degree of washing fastness, dry rubbing fastness, wet resistance Rubbing fastness and light fastness meet the needs of users.

According to the above-mentioned embodiments of the present disclosure, the method for uniformly dyeing the fabric is to dye the fabric through the inkjet printing process, the spray wet process and the steam fixation process. Through the inkjet printing process on the fabric, the dye can be precisely sprayed on the surface of the fabric, thereby reducing the waste of dye. In addition, through the process of spraying and wetting the fabric, it can promote the diffusion of dyes on the surface of the fabric during the steaming and fixing process, thereby improving the dyeing uniformity of the fabric.

Although this disclosure has been disclosed as above in the form of implementation, it is not intended to limit this disclosure. Anyone who is familiar with this technology can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, the protection of this disclosure The scope shall be defined by the appended patent application scope.

50: Fabric 100: dyeing equipment 110: Apparatus for wet steaming 120: conveying element S10~S30: steps

In order to make the above and other purposes, features, advantages and embodiments of the present disclosure more comprehensible, the accompanying drawings are described as follows: FIG. 1 is a schematic diagram showing the configuration of a dyeing device according to an embodiment of the present disclosure. FIG. 2 shows a flow chart of a method for uniformly dyeing fabrics using the dyeing apparatus of FIG. 1 .

Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none

S10~S30: steps

Claims (10)

A method for uniformly dyeing a fabric, comprising: performing an ink-jet printing process on the fabric, so that dyes are arranged on the surface of the fabric in the form of grid dots; performing a spray-wetting process on the fabric, so that the fabric Accepting the liquid droplets; and performing a steam-fixing process on the fabric, so that the dye is diffused on the surface of the fabric and fixed on the surface of the fabric, wherein the spraying is applied to the wet process It is carried out simultaneously with the color fixing process at the steaming place. The method for uniformly dyeing fabrics as described in Claim 1, wherein the relative humidity of the steaming and fixing process is between 15% and 100%. The method for uniformly dyeing fabrics as described in Claim 1, wherein the dyestuff is a sublimation type disperse dye, and the relative humidity of the steaming and fixing process is between 15% and 30%. The method for uniformly dyeing fabrics as described in Claim 1, wherein the dyestuff is a high-fastness disperse dye, and the relative humidity of the steaming and fixing process is between 80% and 100%. The method for uniformly dyeing fabrics as described in Claim 1, wherein the temperature of the steaming and fixing process is between 170°C and 190°C. The method for uniformly dyeing fabrics according to claim 1, wherein the total time of the spraying wet process and the steaming fixation process is between 10 minutes and 20 minutes. The method for uniformly dyeing fabrics as claimed in claim 1, wherein the diameter of the droplets is between 5 microns and 200 microns. The method for uniformly dyeing a fabric as described in claim 1 further includes: analyzing the color strength value (K/S) and the color difference value (CMC△E) of the fabric. The method for uniformly dyeing fabrics as described in claim 8, wherein analyzing the color strength value and the color difference value analysis of the fabric comprises: using a spectrophotometer (Datacolor) to perform a Lab value analysis on the fabric Analysis, wherein the Lab value analysis is to collect 4 sampling points in the fabric to measure the Lab value and calculate the average value, and the circumference diameter of each sampling point is between 9mm and 30mm. The method for uniformly dyeing a fabric as claimed in item 8, wherein when the color strength value of the fabric is less than 20, the color difference value is less than or equal to 0.84.

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